23222647 has 4 divisors (see below), whose sum is σ = 26540176. Its totient is φ = 19905120.

The previous prime is 23222621. The next prime is 23222651. The reversal of 23222647 is 74622232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23222647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23225647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658754 + ... + 1658767.

It is an arithmetic number, because the mean of its divisors is an integer number (6635044).

Almost surely, 2^23222647 is an apocalyptic number.

23222647 is a deficient number, since it is larger than the sum of its proper divisors (3317529).

23222647 is an equidigital number, since it uses as much as digits as its factorization.

23222647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317528.

The product of its digits is 8064, while the sum is 28.

The square root of 23222647 is about 4818.9881718054. The cubic root of 23222647 is about 285.3014026936.

Adding to 23222647 its reverse (74622232), we get a palindrome (97844879).

The spelling of 23222647 in words is "twenty-three million, two hundred twenty-two thousand, six hundred forty-seven".